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/* Test object-spanning accesses.  This is most conveniently done with

   mmap, thus the config.h specificity here.  */

#include "../config.h"

#include <unistd.h>

#include <string.h>

#ifdef HAVE_SYS_MMAN_H

#include <sys/mman.h>

#endif

int main ()

{

#ifndef MAP_ANONYMOUS

#define MAP_ANONYMOUS MAP_ANON

#endif

#ifdef HAVE_MMAP

  void *p;

  unsigned pg = getpagesize ();

  int rc;

  p = mmap (NULL, 4 * pg, PROT_READ|PROT_WRITE,

            MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);

  if (p == NULL)

    return 1;

  memset (p, 0, 4*pg);

  rc = munmap (p, pg);

  if (rc < 0) return 1;

  memset (p+pg, 0, 3*pg);

  rc = munmap (p+pg, pg);

  if (rc < 0) return 1;

  memset (p+2*pg, 0, 2*pg);

  rc = munmap (p+2*pg, pg);

  if (rc < 0) return 1;

  memset (p+3*pg, 0, pg);

  rc = munmap (p+3*pg, pg);

  if (rc < 0) return 1;

#endif

  return 0;

}